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I want user foo to auto-login using LightDM (which has been used by Ubuntu since version 11.10). How would I do that?

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FYI, If you are using home folder encryption, you can't enable auto login. – Saeid Zebardast Mar 30 '13 at 8:37
up vote 38 down vote accepted

You can do this without editing configuration files: go to System Settings > User accounts, click "Unlock" and enter your password, then click the button next to "Automatic login":

'enter image description here

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I'm working on Ubuntu 14.04. Here there is no option as "Automatic Login" as shown in your screen shot. Please say how to enable automatic login. – Ravi Sep 25 '14 at 6:48
@Ravi: the option is still there in Ubuntu 14.04 and 14.10. But there's an alternative answer below for enabling this from the lightdm.conf file. – Alin Andrei Sep 26 '14 at 11:40

An alternative to Alin's answer is to create a file /etc/lightdm/lightdm.conf and add the following content:

autologin-user=<YOUR USER>

Next time you start, auto-login should work like expected.

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Setting autologin-user to your user name is enough for autologin to work. – Smile4ever Oct 22 '14 at 16:47
On old versions there is a bug, if you set autologin-user-timeout=0 (or any other value to autologin-user-timeout), it's not working (LP#902852, debian#682473. – pevik Apr 23 at 4:48

You can easily do this with lightdm-set-defaults if you'd rather not edit lightdm.conf manually:

sudo /usr/lib/lightdm/lightdm-set-defaults --autologin "$USER"

It will not set the autologin timeout, but the default for that is 0 in the code anyway, so you don't need to set it.

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Copy pasters: sudo /usr/lib/lightdm/lightdm-set-defaults --autologin "$USER" – Ciro Santilli 巴拿馬文件 六四事件 法轮功 Feb 10 '14 at 7:34
This doesn't work in 14.04 LTS as lightdm-set-defaults was removed then so the other methods are better. – Robert Ancell Aug 22 '14 at 7:33

For Ubuntu 14.04 create the file:


and add:

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I had to create this file and all it had was this and worked! – Peter Oct 20 '14 at 12:39
I dont have lightdm folder – Arnold Roa Dec 1 '15 at 21:06
gksu gedit /etc/lightdm/lightdm.conf

add lines:







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Open settings, select 'user accounts'. Click the unlock button, then change the Automatic Login switch to "On"

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Thank you Luyang Liu, but this optino is not displayed in User Accounts. – Agmenor Jan 17 '13 at 18:34

Search for "User Accounts" application. Select the account you want to autologin Toggle the Automatic Login switch to On

That should do the work.

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I have 12.10 xubuntu. In users and groups choose your user, and click word "Change..." next to "Password:" (it does not look like a button, what might be a bit misleading). There you can change password, or at the bottom mark "Don't ask for password on login" box.

Hope it works.

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Thank you very much Chris. However, as explained in my question, this solution is not displayed in User Accounts. – Agmenor Jan 17 '13 at 18:34

I just discovered that, I need to have ubuntu-desktop to be install before lightdm could function. This solved my issue when trying to get lightdm to actually login in without going in loop.

The reason for the system to go in loop may be because lightdm needs the ubuntu desktop before it may work.

sudo apt-get install ubuntu-desktop
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